450 EXPERIMENT STATION RECOED. 



Report on timber conditions, etc., along the proposed route of the Hud- 

 son Bay Railway, J. K. Dickson {Dci)t. Int. Canada, Forestry Branch Bui, 



17, 1911, pp. 21, pi. I, figs. 5). — This embraces the results of an inspection mnde 

 under the direction of the Forestry Branch of the Canadian Deiiartmont of 

 the Interior. It describes the district covered and gives the details of location 

 and quantities of timber. 



Rocky Mountains Forest Reserve — Report of boundary survey parties, 

 G. H. Edgeco.mb and P. Z. Caverhill {Dept. Int. Canada, Forestry Brancli Bui. 



18, 1911, pp. 21, pi. 1, figs. H). — This consists of reports of forest surveys 

 conducted on the eastern slope of the Rocky Mountains in 1910 for the pur- 

 pose of determining the line of the eastern boundary of the Rocky Mountains 

 Forest Keserve. 



A self -registering caliper for measuring trees. Wild {Forstw. Centbl. n. 

 ser., 33 {1911), No. 6, pp. 30-5-308, figs. 2). — A self-registering caliper, which 

 is said to have been used successfully in measuring a number of species of trees, 

 is here illustrated and described. 



Multiple volume table, L. Cbowell (Forestry Quart., 9 (1911), No. 2, p, 

 262). — A form is given for a multiple volume table to be used as an aid in com- 

 puting the total volume of any area in which the trees are tallied by diameters 

 and height classes. The multiple table is compiled from a volume table of the 

 species estimated. 



Wood utilization in 1909 (Bol. Min. Agr., Indus, e Com. [Rome], 9 (1910), 

 Ser. A, No. 20, pp. 813-881). — This consists of a statistical summary for the 

 various Provinces and districts of Italy relative to the quantity and value of 

 construction and industrial woods, firewood, and charcoal wood used from the 

 state and private forests in 1909. 



Seasoning wood by electricity, A. Halstead (Daily Cons, and Trade Rpts. 

 [U. 8.], l.'i (1911), No. 1J,9, p. 1313).— This consists of a brief description 

 credited to a British technical paper concerning a new process of seasoning 

 wood by electricity in France. 



"A lai'ge tank is filled with a solution containing 10 per cent of borax and 

 5 per cent of resin, with just a trace of carbonate of soda. In the bottom of 

 the tank is a lead plate which is electrically connected to the positive pole of 

 the dynamo. The timber to be treated is stacked on this plate, and when the 

 tank has been filled another plate is superimposed and connected to the nega- 

 tive pole of the dynamo. When the current is switched on it passes through 

 the stack of wood between the 2 plates and in its passage it is said to drive 

 out the sap in the timber and deposit borax and resin in its place, completely 

 filling up all pores and interstices. When the process is completed the timber 

 is removed and dried, after which it is ready for use. It is claimed that the 

 timber submitted to this treatment, no matter how green it may be, becomes 

 completely seasoned." 



Forest products of Canada, 1909. — Tan bark and tanning extract used, 

 H. R. MacMillan (Dept. Int. Canada, Forestry Brandt Bui. 20, 1911, pp. 6). — 

 This is a statistical review based upon information received from 67 tanneries 

 and representing about 90 per cent of the vegetable tannin consumption in 

 Canada. The total value of all the vegetable tanning materials used by 

 Canadian tanneries in 1909 was $1,126,004. 



DISEASES OF PLANTS. 



Report of plant pathologist, H. S. Fawcett (Florida Sta, Rpt. 1910, pp. 

 XLV-LXV, figs. IJf). — The work of the year consisted mainly of investigations 

 of the diseases of citrus trees, including stem-end rot, gummosis, scaly bark, 



